Detachable tread for boots and shoes.



No. 836,364. I PATENTBD NOV. 20, 1906.

N.J.BUSBY.

DETAGHABLB TREAD FOR BOOTS AND SHOES.

APPLICATION FILED FEB. 5. 1906.

- UNITED STATES PATENT? OFFICE.

NAHUM JUDSON BUSBY. or BOSTON, MASSACHUSETTS, ASSie oR-To E. A. c. BUSBY, or CHELSEA, MASSACHUSETTS.

DETACHABLE TREAD FOFI Boo-rs ANp SHOE-S.

Specification of Letters Patent.

Patented, Nov.'20, 1906:

Application filed February 5, 1906- Serial 1%. 299.622.

ton, in the county of Suffolk, State of Massa-.

chusetts, have invented new and useful Improvements in Detachable Treads for Boots and Shoes, of which the following is a. specification.

My invention'relates to detachable t'reads for the soles and heels for boots and shoes, and has for its object to provide an improved construction of the same wherein an antislipping tread-surface will be presented that will be otherwise yielding when in use, said yielding or resilient result being produced b means other than the inherent resilient q ua ity possessed by. the character of the articles themselves. This object I accomplish in. the manner and by the means hereinafter described and claimed, reference being had to the accompanying drawings, in which- Figure l is a side elevation of a shoe, showing my improved detachable sole and heel applied thereto, the same being shown partly in section. Fig. 2 is atransverse' sectional view .of the sole'portion, taken-on the line 2 2, Fig.

1L Fig. 3 is a plan view of the inner surface of said detachable sole and heel.

plan view of the 'outer surface'of the same.

Similar numerals of reference denote corresponding parts in the several views.

In the said drawings the reference-numeral 1 denotes the shoe proper having attached thereto my improved sole-and heel. Refer.

ring 'more particularly to the sole, the same consists. of an 'inclosing outer rim or wall 2 of Solidr'ubber or other suitable material'adapted to receive suitable means 3 for attaching it I to the sole 4 of the shoe, said attaching means consisting of nails'or sexving thread; as may be desired; Located within and filling the space within said rim or wall 2 is a tread-surface 5, formed of a mixture of flexible rubber.

' .or cement and a gritty substance, the same being oval o'r cup-shaped, as shown, to provide 11 are permanently united to their'respec:

. a projecting tread-surface and toleave an intervening space between it and the shoe-sole 4."- Located In this space centrally and transversely of the sole is a bridge 6, formed of clear rubber and cemented or otherwise attached to the/inner surface of said tread-surf ace. This bridge 6 is formed with two transverse raised portions 7 and. 8, fo rming an intervening saucer-shaped space, and has quite Fig. 4 is a g v 4 10 with their treads Sand 11', which gradually merge into narrow lines of contact with tions- 7 a broad area ofcontact with the tread 5, that 5 5 gradually mergesxinto narrow 1. nes of contactwith the boot or shoe sole 4', as best shown 1n Fig. 1 The raised :portion .7 is adapted to normally contact with the shoe-soled, while the raised portion 8 lies normally aslight distance awayv from contact therewith, the whole forming a series of three distinct chamhere betweenthe shoe-sole 4'.and tread-surface 5, as' -'sh.own. In' respect to the'heeltread the construction is substantially the same, except that the inclosing rim orjwall 9 and bridge -IO-eXtend over theentire inner surface of thedetachable heel, the; combined elastic cement and grit surface 11 being lo--.

cated in a recess formed'inthe outer surface of said intermediate part, as shown.

In use the gritty or. antislipping treads. .5

and 11 receive the whole wear, the bridges 6- and 10 forming'not. only a reinforce for said treads, but also acting to additionally cushion the tread, the points of constantcontact. 7

and 12 resisting the weight initially and upon contact .8 an 13, which are' then brought in contact with the shoe-sole land heel '14, respectively. Furthermore, by reason of theyielding bein supplemented by-the points of broad areas of 'contact'of said bridg'e SG and the boot or shoe sole and heel, said bridgesoffer a constantly increasing resistance in. 4 proportion to the weight imposed thereon,

the area of contact of the transverse'projec not onlya'reliable ,antislippingtread, but also an improved'--yieldin'g detachable sole and'heel'having means for positively and resiliently resistingv the weight. I

It Wlll beunderstood that thetreads 5 and tive outer'rims or walls 3 and 9 and bridges 6 and 10in the processof manufacture, the same each constituting when made "a single practically homogeneous. article, the bridges 7 and, 10. effectually resisting any tendency.

that, the combined grit and cement tread 8, '12,. and 1-3 increasing 'longitudisurface 5 and 11 may have to crack or break under the weight of the wearer.

Having thus described my invention, what I claim as new, ters Patent, is

17 A detachable tread for boots and shoes, embodying a tread-surface, an exterior rim or Wall of flexible material, and an intermediate transverse bridge of flexible material having a broad area of contact with the tread and gradually merging into a narrow line of contact with the boot or shoe sole, said bridge forming a plurality of chambers between said tread and the boot or shoe sole.

2. A detachable tread for boots and shoes, embodying a tread-surface of elastic cement and grit, an exterior rim or wall of flexible material, and an intermediate transverse bridge of flexible material having a broad area of contact with the tread and gradually merging into a narrow line of contact with the boot or shoe sole, said bridge forming a plurality of chambers between said tread and the boot or shoe sole.

3. A detachable tread for boots and shoes, embodying a tread-surface of elastic cement and grit, an exterior rim or wall of flexible material, and an intermediate bridge of flexible material having a plurality of transverse contactsurlaces of different elevations form- 'ing a plurality of chambers between said by said contact-surfaces are adapted to successively contact with said boot or shoe sole or heel under the weight of the wearer.

4. A detachable tread for boots and shoes, embodying an exterior rim or wall of flexible material, a treadsurface of elastic cement and grit located within said rim or wall and formed of oval or cup shape to leave an intervening space between thesame and the boot or shoe sole or heel, and an intermediate bridge of flexible material located in said i a l i l l contact-surfaces forming a plurality of cham bers between said tread-surface and the boot or shoe sole or heel, 'said bridge having a broad area of contact with the tread and gradually merging into narrow lines of contact with the boot 0r shoe sole.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

NAHUM JUDSON BUSBY.

Witnesses:

E. A. G. BUsBY, NAHUM J. BUsBY, Jr.

and desire to secure by Let tread and the boot or shoe sole or heel,whereo space and having a plurality of transverse 

